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Loft insulation

Discussion in 'Floors, Stairs and Lofts' started by andypotter, 13 Apr 2021.

  1. andypotter

    andypotter

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    Staffordshire
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    Hi I'm going to insulate my loft, I think I'm going to use foil as it's cheapest and easiest to install, I've read that I need to leave a min 25mm gap between felt and foil, and min 25mm gap between foil and plaster board.

    Of I wanted to put 2 layers of foil Could I put one layer on top of another.

    Thanks
     
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  3. mikeey84

    mikeey84

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    I would rethink your plan.

    There is little reputable evidence that the foils give any real insulation effect beyond a bare minimum.

    Standard method is to fill between the rafters with PIR board, then board over with more PIR and plasterboard.

    Foil maybe attractive to use, but I think you would be disappointed in the results
     
  4. Ian H

    Ian H

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    If it’s a room you insulate the ceiling, if it’s just storage or empty you insulate the floor.
     
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